Disappearance

Recently, many of the Vocaloid stars as well as the Utauloid stars have vanished. All their fans know is they're on an extended break, but in reality they've been transported to a game. In this game, you must solve each puzzle correctly, or one member of the group dies. This continues until only one remains, unless you play your card right.

The question now remains...Can they all work together to get out alive?

The even bigger question... Are they really gone?